Four Seasons 39608 A/C Expansion Valve - Front

Reliable A/C Expansion Valve for Infiniti and Nissan Vehicles

The Four Seasons Expansion Valve 39608 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for Infiniti Armada, Nissan QX56, and QX80 models, this aluminum block-type valve ensures efficient cooling performance with R134a refrigerant compatibility.

• Constructed from durable aluminum material for corrosion resistance
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with O-ring seals
• Meets or exceeds OEM specifications for reliable fit and function

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve line focuses on precise refrigerant flow control components for automotive HVAC systems. This product line offers block-type valves without solenoids, designed to maintain optimal air conditioning performance. The 39608 valve fits select Infiniti and Nissan models, providing a direct replacement that supports system efficiency and durability.

Detailed Product Description and Specifications

This A/C expansion valve features a block-type design made from aluminum, providing strength and resistance to corrosion. It is designed for use with R134a refrigerant and includes two mounting holes for secure attachment. Both suction and liquid inlet/outlet fittings are female with O-ring seals, ensuring leak-free connections. The suction inlet fitting thread diameter is No. 10, and the outlet is No. 12, while the liquid inlet and outlet fittings have thread diameters of No. 6 and No. 8 respectively. The valve’s liquid inlet size measures 0.4 inches (10.15 mm), and the liquid outlet size is 0.55 inches (14 mm). Suction inlet and outlet sizes are 0.7 inches (17.8 mm). This valve is designed without a solenoid, suitable for systems that do not require electronic control of refrigerant flow.

Common Applications and Issues Addressed

• Restores proper refrigerant flow in Infiniti Armada and Nissan QX56/QX80 A/C systems
• Resolves inconsistent cabin cooling or fluctuating air temperatures
• Eliminates refrigerant leaks caused by worn or damaged expansion valves
• Prevents compressor damage due to improper refrigerant metering
• Improves overall HVAC system efficiency and reliability

Installation Notes and Tips

Ensure the vehicle’s A/C system is properly evacuated and depressurized before installation. Verify compatibility with Infiniti Armada, Nissan QX56, or QX80 models. Use appropriate O-ring seals on all fittings to prevent leaks. Tighten mounting bolts securely using the two provided mounting holes. Avoid overtightening fittings to prevent damage to the valve or refrigerant lines. After installation, perform a system leak test and recharge with R134a refrigerant according to manufacturer specifications.

Quality Assurance and Warranty Information

The Four Seasons Expansion Valve 39608 meets or exceeds OEM standards for fit, form, and function. Manufactured with high-quality aluminum and precision engineering, this valve is designed for durability and reliable performance. Warranty coverage details should be confirmed with the product documentation or supplier, ensuring peace of mind with your replacement part.